Mathematics › Differential Equations › Variable Separable Form
f'x=tan-1secx+tanx=tan-11+sinxcosx=tan-11-cosπ2+xsinπ2+x
⇒f'(x)=tan-12sin2π4+x22sinπ4+x2cosπ4+x2
⇒f'xdx=π4+x2dx
⇒fx=π4x+x24+c
∵f0=0⇒c=0
So, f1=π+14
Asked in: JEE Main 2020 (09 Jan Shift 1)
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